diff options
Diffstat (limited to 'coin/provisioning/common/shared/telegraf/telegraf-ioping.sh')
| -rw-r--r-- | coin/provisioning/common/shared/telegraf/telegraf-ioping.sh | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/coin/provisioning/common/shared/telegraf/telegraf-ioping.sh b/coin/provisioning/common/shared/telegraf/telegraf-ioping.sh new file mode 100644 index 00000000..ad95eadc --- /dev/null +++ b/coin/provisioning/common/shared/telegraf/telegraf-ioping.sh @@ -0,0 +1,26 @@ +#!/bin/sh + +# Measure I/O latency once, return data in InfluxDB format +# +# Run one ioping command for read, and one for write. +# Each one sends 3 requests and reports the minimum time, in nanoseconds. +# (Because of limitations of ioping, we can't just send one request and get +# the number back in the batch format. Additionally, the number seems to be +# fluctuating quite a bit so taking the smallest number out of 3 requests is +# stabilising it a bit.) + + +set -e + +[ x"$1" = x ] && echo "$0 takes a path as a first argument" && exit 1 + +# Try to run in high priority to avoid slow-downs because of +# factors other than I/O. +renice -n -10 -p $$ >/dev/null 2>&1 || true + + +rlatency="$(ioping -B -k -c 3 -i 0.1 "$1" | cut -d " " -f 5)" +wlatency="$(ioping -B -k -c 3 -i 0.1 -W "$1" | cut -d " " -f 5)" + +printf "ioping,path=$1 read_latency_ns=%u,write_latency_ns=%u\n" \ + $rlatency $wlatency |